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7th Math 5.15

Last updated over 2 years ago
7 questions
IP
1

More Averages--Arlene instead decided to ask Mr. Espinoza, Mr. Hwung, Mr. Mancini, Mr. Kovalik, and Mr. Vasquez how tall they are to estimate the average Prize teacher height:

73 inches, 76 inches, 74 inches, 75 inches, 72 inches.

a) What is Arlene's estimate for the mean teacher height?

"Arlene's estimate for the mean teacher height..."

CFS:
#1: Accurately finds the sum of the data
#2: Accurately divides by total number of observations

1

b) Do you think Arlene's sample data is a good estimate for the average teacher height? Is it representative?
Why or why not?

"I think Arlene's sample data is..."

CFS:
#1: Makes an accurate claim for whether or not the sample is representative
#2: Provides relevant evidence

1

Champs--In the 2017 NBA Playoffs, Steph Curry made a lot points in the last 7 games to help the Warriors win.

Points per game: 21, 36, 28, 32, 26, 14, 34

What was his average (mean) number of points per game? You can round your answer to the nearest tenths or hundredths.

"Steph Curry's average number of points per game..."

CFS:
#1: Accurately finds the sum of the data
#2: Accurately divides by total number of observations

1

GPA--Student McStudentson had the following grades on his progress report. His dad said that if he got at least an 85 average he would buy him 1,000 V-Bucks.

Was McStudentson able to get his reward? Explain using mathematical evidence.

"McStudentson (was / was not) able to get his reward because..."

CFS:
#1: Accurately finds the sum of the data
#2: Accurately divides by total number of observations

1

New Car--Ms. Bizzell wants to buy a new car with good fuel efficiency (miles per gallon). She finds a random sample of 10 cars and their fuel efficiencies on the internet:

22, 25, 29, 23, 56, 29, 28, 22, 23, 27 (all in miles per gallon)

What was the average fuel efficiency of the sample?

CFS:
#1: Accurately finds the sum of the data
#2: Accurately divides by total number of observations

1

SPICY--Try if you have time
**You may use a calculator for this question only. Please still show what numbers you are using, any operations, etc.**

Real Estate--Ms. Rosenthal wants to find the average house price around Northern California.
She can either find the average of homes in Los Altos only or she can find the average of houses from a few different cities.
(The prices below are in the millions. $3.7M is $3,700,000 and $0.472M is $472,000)

Los Altos only: $3.7M, $2.9M, $4.5M, $3.1M
Los Altos, San Francisco, and Modesto, San Jose: $3.7M, $1.1M, $0.472M, $1.9M, $0.998M

a) What is the mean price for both sets of data?

"a) The mean house prices are..."

b) Which sample would be more representative of house prices around Northern California? Why?

"b) The sample that is more representative is... because..."

Excellent work!

For extra mean/average practice, find the new skill on IXL.
You can also work on more advanced math.

**Please wait until we start the Exit Ticket together as a class**

Note: If you are absent, you should watch the video below to get an idea of how to calculate means. It is an outdated video so some of the problems and numbers have changed, but it will still help you complete the formative. Just do your best!
ET
4

What does a mean mean?--Ms. Bizzell is curious about how much reading really goes on at home in the 7th grade. A random sample of students from each homeroom tell her how many minutes per day they have been reading:

Churchills: 25, 35, 40, 30, 15
Marshalls: 50, 10, 25, 20, 25
Faulkners: 30, 30, 27, 35, 25, 23

Which homeroom sample has the highest mean reading time?

"The homeroom with the highest mean reading time is..."

CFS:
#1: Accurately finds the sum of the data
#2: Accurately divides by total number of observations

Make sure you are logged into your account from Clever then try the following skills on IXL:
--Calculate mean, median, mode, and range (U2A)
--Interpret charts and graphs to find mean, median, mode, and range (CYK)